1 /* 2 * Channel subsystem structures and definitions. 3 * 4 * Copyright 2012 IBM Corp. 5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or (at 8 * your option) any later version. See the COPYING file in the top-level 9 * directory. 10 */ 11 12 #ifndef CSS_H 13 #define CSS_H 14 15 #include "hw/s390x/adapter.h" 16 #include "hw/s390x/s390_flic.h" 17 #include "hw/s390x/ioinst.h" 18 19 /* Channel subsystem constants. */ 20 #define MAX_DEVNO 65535 21 #define MAX_SCHID 65535 22 #define MAX_SSID 3 23 #define MAX_CSSID 255 24 #define MAX_CHPID 255 25 26 #define MAX_ISC 7 27 28 #define MAX_CIWS 62 29 30 #define VIRTUAL_CSSID 0xfe 31 #define VIRTIO_CCW_CHPID 0 /* used by convention */ 32 33 typedef struct CIW { 34 uint8_t type; 35 uint8_t command; 36 uint16_t count; 37 } QEMU_PACKED CIW; 38 39 typedef struct SenseId { 40 /* common part */ 41 uint8_t reserved; /* always 0x'FF' */ 42 uint16_t cu_type; /* control unit type */ 43 uint8_t cu_model; /* control unit model */ 44 uint16_t dev_type; /* device type */ 45 uint8_t dev_model; /* device model */ 46 uint8_t unused; /* padding byte */ 47 /* extended part */ 48 CIW ciw[MAX_CIWS]; /* variable # of CIWs */ 49 } QEMU_PACKED SenseId; 50 51 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ 52 typedef struct CMB { 53 uint16_t ssch_rsch_count; 54 uint16_t sample_count; 55 uint32_t device_connect_time; 56 uint32_t function_pending_time; 57 uint32_t device_disconnect_time; 58 uint32_t control_unit_queuing_time; 59 uint32_t device_active_only_time; 60 uint32_t reserved[2]; 61 } QEMU_PACKED CMB; 62 63 typedef struct CMBE { 64 uint32_t ssch_rsch_count; 65 uint32_t sample_count; 66 uint32_t device_connect_time; 67 uint32_t function_pending_time; 68 uint32_t device_disconnect_time; 69 uint32_t control_unit_queuing_time; 70 uint32_t device_active_only_time; 71 uint32_t device_busy_time; 72 uint32_t initial_command_response_time; 73 uint32_t reserved[7]; 74 } QEMU_PACKED CMBE; 75 76 typedef struct SubchDev SubchDev; 77 struct SubchDev { 78 /* channel-subsystem related things: */ 79 uint8_t cssid; 80 uint8_t ssid; 81 uint16_t schid; 82 uint16_t devno; 83 SCHIB curr_status; 84 uint8_t sense_data[32]; 85 hwaddr channel_prog; 86 CCW1 last_cmd; 87 bool last_cmd_valid; 88 bool ccw_fmt_1; 89 bool thinint_active; 90 uint8_t ccw_no_data_cnt; 91 /* transport-provided data: */ 92 int (*ccw_cb) (SubchDev *, CCW1); 93 void (*disable_cb)(SubchDev *); 94 int (*do_subchannel_work) (SubchDev *, ORB *); 95 SenseId id; 96 void *driver_data; 97 }; 98 99 /* 100 * Identify a device within the channel subsystem. 101 * Note that this can be used to identify either the subchannel or 102 * the attached I/O device, as there's always one I/O device per 103 * subchannel. 104 */ 105 typedef struct CssDevId { 106 uint8_t cssid; 107 uint8_t ssid; 108 uint16_t devid; 109 bool valid; 110 } CssDevId; 111 112 extern PropertyInfo css_devid_propinfo; 113 114 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ 115 DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) 116 117 typedef struct IndAddr { 118 hwaddr addr; 119 uint64_t map; 120 unsigned long refcnt; 121 int len; 122 QTAILQ_ENTRY(IndAddr) sibling; 123 } IndAddr; 124 125 IndAddr *get_indicator(hwaddr ind_addr, int len); 126 void release_indicator(AdapterInfo *adapter, IndAddr *indicator); 127 int map_indicator(AdapterInfo *adapter, IndAddr *indicator); 128 129 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, 130 uint16_t schid); 131 void subch_device_save(SubchDev *s, QEMUFile *f); 132 int subch_device_load(SubchDev *s, QEMUFile *f); 133 int css_create_css_image(uint8_t cssid, bool default_image); 134 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); 135 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, 136 uint16_t devno, SubchDev *sch); 137 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); 138 int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id); 139 unsigned int css_find_free_chpid(uint8_t cssid); 140 uint16_t css_build_subchannel_id(SubchDev *sch); 141 void copy_scsw_to_guest(SCSW *dest, const SCSW *src); 142 void css_inject_io_interrupt(SubchDev *sch); 143 void css_reset(void); 144 void css_reset_sch(SubchDev *sch); 145 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid); 146 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, 147 int hotplugged, int add); 148 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); 149 void css_generate_css_crws(uint8_t cssid); 150 void css_clear_sei_pending(void); 151 void css_adapter_interrupt(uint8_t isc); 152 int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data); 153 int do_subchannel_work_virtual(SubchDev *sub, ORB *orb); 154 int do_subchannel_work_passthrough(SubchDev *sub, ORB *orb); 155 156 typedef enum { 157 CSS_IO_ADAPTER_VIRTIO = 0, 158 CSS_IO_ADAPTER_PCI = 1, 159 CSS_IO_ADAPTER_TYPE_NUMS, 160 } CssIoAdapterType; 161 162 uint32_t css_get_adapter_id(CssIoAdapterType type, uint8_t isc); 163 void css_register_io_adapters(CssIoAdapterType type, bool swap, bool maskable, 164 Error **errp); 165 166 #ifndef CONFIG_USER_ONLY 167 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, 168 uint16_t schid); 169 bool css_subch_visible(SubchDev *sch); 170 void css_conditional_io_interrupt(SubchDev *sch); 171 int css_do_stsch(SubchDev *sch, SCHIB *schib); 172 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); 173 int css_do_msch(SubchDev *sch, const SCHIB *schib); 174 int css_do_xsch(SubchDev *sch); 175 int css_do_csch(SubchDev *sch); 176 int css_do_hsch(SubchDev *sch); 177 int css_do_ssch(SubchDev *sch, ORB *orb); 178 int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); 179 void css_do_tsch_update_subch(SubchDev *sch); 180 int css_do_stcrw(CRW *crw); 181 void css_undo_stcrw(CRW *crw); 182 int css_do_tpi(IOIntCode *int_code, int lowcore); 183 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, 184 int rfmt, void *buf); 185 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); 186 int css_enable_mcsse(void); 187 int css_enable_mss(void); 188 int css_do_rsch(SubchDev *sch); 189 int css_do_rchp(uint8_t cssid, uint8_t chpid); 190 bool css_present(uint8_t cssid); 191 #endif 192 193 extern PropertyInfo css_devid_ro_propinfo; 194 195 #define DEFINE_PROP_CSS_DEV_ID_RO(_n, _s, _f) \ 196 DEFINE_PROP(_n, _s, _f, css_devid_ro_propinfo, CssDevId) 197 198 /** 199 * Create a subchannel for the given bus id. 200 * 201 * If @p bus_id is valid, and @p squash_mcss is true, verify that it is 202 * not already in use in the default css, and find a free devno from the 203 * default css image for it. 204 * If @p bus_id is valid, and @p squash_mcss is false, verify that it is 205 * not already in use, and find a free devno for it. 206 * If @p bus_id is not valid, and if either @p squash_mcss or @p is_virtual 207 * is true, find a free subchannel id and device number across all 208 * subchannel sets from the default css image. 209 * If @p bus_id is not valid, and if both @p squash_mcss and @p is_virtual 210 * are false, find a non-full css image and find a free subchannel id and 211 * device number across all subchannel sets from it. 212 * 213 * If either of the former actions succeed, allocate a subchannel structure, 214 * initialise it with the bus id, subchannel id and device number, register 215 * it with the CSS and return it. Otherwise return NULL. 216 * 217 * The caller becomes owner of the returned subchannel structure and 218 * is responsible for unregistering and freeing it. 219 */ 220 SubchDev *css_create_sch(CssDevId bus_id, bool is_virtual, bool squash_mcss, 221 Error **errp); 222 #endif 223